CN102545752A - Protective circuit of stepping motor driving circuit - Google Patents
Protective circuit of stepping motor driving circuit Download PDFInfo
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- CN102545752A CN102545752A CN2011104606093A CN201110460609A CN102545752A CN 102545752 A CN102545752 A CN 102545752A CN 2011104606093 A CN2011104606093 A CN 2011104606093A CN 201110460609 A CN201110460609 A CN 201110460609A CN 102545752 A CN102545752 A CN 102545752A
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Abstract
The invention discloses a protective circuit of a stepping motor driving circuit. The driving circuit comprises an audion, and the protective circuit comprises a bipolar diode of which the breakdown voltage is higher than a power voltage, but lower than the breakdown voltage of the audion. The protective circuit can be used for preventing a power audion from being broken down, so that the stepping motor driving circuit is protected.
Description
Technical field
The present invention relates to stepper motor driving circuit, relate in particular to a kind of protective circuit of stepper motor driving circuit.
Background technology
Shown in accompanying drawing 1; The drive circuit works principle of composite stepper motor is following: the normal H bridge drive circuit that uses of bipolar machine; Four pliotron M1-M4 have formed the charge circuit of winding in the H bridge; And the direction of control phase current: pliotron M1, M4 open and pliotron M2, when M3 closes, have added supply voltage V on the winding
AB=VCC (conduction voltage drop of ignoring pliotron, down together), phase current flows from node A toward Node B and increases gradually, and this is positive charge loop (loop among the figure is 1.); Pliotron M2, M3 open and pliotron M1, when M4 closes, added reverse supply voltage V on the winding
AB=VCC, phase current flows from Node B toward node A and increases gradually, and this is reverse charging process (not indicating among the figure).And diode D1-D4 in the H bridge and pliotron M1-M4 cooperate the afterflow discharge loop that constitutes phase current.When charge circuit was closed, because the inductance characteristic of winding itself, electric current wherein can not be reduced to zero at once, and can produce induced electromotive force, must provide the afterflow discharge loop to guarantee that phase current can reduce gradually for this reason.Flowing from node A toward Node B with charging current is the path of example explanation discharge loop, has two afterflow discharge loops in the H bridge as shown in the figure.When pliotron M1 conducting, in can formation figure when all the other pliotrons are closed the loop 2..This moment, phase current diode D1 and the pliotron M1 formation loop of flowing through added a little reverse voltage V on the winding
AB=V
D(V wherein
DBe the forward conduction voltage drop of diode).Because | V
AB| less, the phase current decay is slow, and this phase current decay mode is called as evanescent mode at a slow speed.If all pliotrons are all closed, then can form among the figure the loop 3., this moment flow through diode D2, D3 of phase current, GND flows to power supply from ground, the voltage V on the winding
AB=-VCC-2V
DBecause | V
AB| bigger, the phase current decay is rapid, and this phase current decay mode is called as quick evanescent mode.
As shown in Figure 4, because the internal resistance of source is connected in the discharge loop, if internal resistance strengthens, then discharging current will reduce, and the motor windings voltage will raise.Under the extreme case, electric power loop breaks off suddenly, and the discharge loop impedance is infinitely great, and the motor windings two ends will produce very high voltage, this moment will inevitably with chip that winding links to each other in the puncture of power triode.
Because discharge loop need pass through electric power loop, if following two kinds of situation occur, then pliotron may be breakdown in the chip:
(1) electric power loop breaks off suddenly, and discharge loop is cut off.
(2) electric power loop produces fault, and internal resistance strengthens suddenly.
Summary of the invention
To the problems referred to above that exist in the prior art, the invention provides a kind of protective circuit of stepper motor driving circuit.
The invention provides a kind of protective circuit of stepper motor driving circuit, drive circuit comprises triode, and protective circuit comprises bipolar diode, and the puncture voltage of bipolar diode is higher than supply voltage but less than the puncture voltage of triode.
In one example, drive circuit is a H bridge drive circuit, and triode is the NPN triode.
In one example, H bridge drive circuit comprises NPN triode M1-M4 and diode D1-D4; The collector electrode of NPN triode M1 connects supply voltage; The emitter of NPN triode M1 connects the collector electrode of NPN triode M3 and the anode of diode D1; The grounded emitter of NPN triode M3; The negative electrode of diode D1 connects supply voltage, and the anode of diode D1 connects the negative electrode of diode D3, the plus earth of diode D3;
The collector electrode of NPN triode M2 connects supply voltage; The emitter of NPN triode M2 connects the collector electrode of NPN triode M4 and the anode of diode D2; The grounded emitter of NPN triode M4; The negative electrode of diode D2 connects supply voltage, and the anode of diode D2 connects the negative electrode of diode D4, the plus earth of diode D4;
Be connected to inductance between the anode of the anode of diode D1 and diode D2.
In one example, be connected with bipolar diode TVS1 between the anode of the anode of said diode D1 and diode D2.
The present invention can avoid the puncture of pliotron breakdown, thereby has protected the drive circuit of stepping motor.
Description of drawings
Come the present invention is done further explain below in conjunction with accompanying drawing, wherein:
Fig. 1 is the H bridge drive circuit of existing composite stepper motor;
Fig. 2 is the protective circuit positive charge sketch map of H bridge drive circuit of the present invention;
Fig. 3 is the protective circuit reverse charging sketch map of H bridge drive circuit of the present invention.
Embodiment
The present invention adopts bipolar diode protective circuit, and its normal puncture voltage is higher than supply voltage, but is lower than the reverse breakdown voltage of four pliotrons.When operate as normal, be equivalent to open circuit, to not influence of circuit.When power supply broke off suddenly or produces fault, the inductance two ends produced high pressure, puncture bipolar diode, and induced potential forms discharge loop through bipolar diode TVS1 and motor windings internal resistance, and induced potential obtains discharging, thereby pliotron is protected.
Physical circuit as shown in Figures 2 and 3, H bridge drive circuit comprises NPN triode M1-M4 and diode D1-D4; The collector electrode of NPN triode M1 connects supply voltage; The emitter of NPN triode M1 connects the collector electrode of NPN triode M3 and the anode of diode D1; The grounded emitter of NPN triode M3; The negative electrode of diode D1 connects supply voltage, and the anode of diode D1 connects the negative electrode of diode D3, the plus earth of diode D3; The collector electrode of NPN triode M2 connects supply voltage; The emitter of NPN triode M2 connects the collector electrode of NPN triode M4 and the anode of diode D2; The grounded emitter of NPN triode M4; The negative electrode of diode D2 connects supply voltage, and the anode of diode D2 connects the negative electrode of diode D4, the plus earth of diode D4; Be connected to inductance between the anode of the anode of diode D1 and diode D2; Bipolar diode is connected between the anode of anode and diode D2 of diode D1.
The above is merely preferred implementation of the present invention, but protection range of the present invention is not limited thereto.Any those skilled in the art all can carry out suitable change or variation to it in technical scope disclosed by the invention, and this change or variation all should be encompassed within protection scope of the present invention.
Claims (4)
1. the protective circuit of a stepper motor driving circuit is characterized in that, drive circuit comprises triode, and protective circuit comprises bipolar diode, and the puncture voltage of bipolar diode is higher than supply voltage but less than the puncture voltage of triode.
2. protective circuit as claimed in claim 1 is characterized in that, drive circuit is a H bridge drive circuit, and triode is the NPN triode.
3. protective circuit as claimed in claim 1 is characterized in that, H bridge drive circuit comprises NPN triode (M1-M4) and diode (D1-D4); The collector electrode of NPN triode (M1) connects supply voltage; The emitter of NPN triode (M1) connects the collector electrode of NPN triode (M3) and the anode of diode (D1); The grounded emitter of NPN triode (M3); The negative electrode of diode (D1) connects supply voltage, and the anode of diode (D1) connects the negative electrode of diode (D3), the plus earth of diode (D3);
The collector electrode of NPN triode (M2) connects supply voltage; The emitter of NPN triode (M2) connects the collector electrode of NPN triode (M4) and the anode of diode (D2); The grounded emitter of NPN triode (M4); The negative electrode of diode (D2) connects supply voltage, and the anode of diode (D2) connects the negative electrode of diode (D4), the plus earth of diode (D4);
Be connected to inductance between the anode of the anode of diode (D1) and diode (D2).
4. protective circuit as claimed in claim 3 is characterized in that, is connected with bipolar diode (TVS1) between the anode of the anode of said diode (D1) and diode (D2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104606093A CN102545752A (en) | 2011-12-31 | 2011-12-31 | Protective circuit of stepping motor driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104606093A CN102545752A (en) | 2011-12-31 | 2011-12-31 | Protective circuit of stepping motor driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102545752A true CN102545752A (en) | 2012-07-04 |
Family
ID=46351856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104606093A Pending CN102545752A (en) | 2011-12-31 | 2011-12-31 | Protective circuit of stepping motor driving circuit |
Country Status (1)
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| CN (1) | CN102545752A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273877A (en) * | 2013-05-17 | 2013-09-04 | 柳州职业技术学院 | Controller of indicating board for school bus parking |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2355485Y (en) * | 1998-10-09 | 1999-12-22 | 杨公俊 | Multifunctional three phase protection electronic switch |
| US6204729B1 (en) * | 1997-12-19 | 2001-03-20 | Nikon Research Corporation Of America | H-bridge power amplifier for a motor |
| DE10222538A1 (en) * | 2002-05-17 | 2003-11-27 | Siemens Ag | Process for an actuator drive has electric motor in a square operating system having an H bridge circuit |
| CN101879942A (en) * | 2010-06-25 | 2010-11-10 | 北京航空航天大学 | Helicopter rotor wing automatic clutch control system with safety protection function |
| CN201918896U (en) * | 2010-11-03 | 2011-08-03 | 淄博安培电气有限公司 | Controlling circuit for improving working current of switched reluctance motor and direct-current motor |
| CN202076975U (en) * | 2011-06-03 | 2011-12-14 | 宁波杜亚机电技术有限公司 | Direct-current (DC) motor power interruption braking device |
-
2011
- 2011-12-31 CN CN2011104606093A patent/CN102545752A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6204729B1 (en) * | 1997-12-19 | 2001-03-20 | Nikon Research Corporation Of America | H-bridge power amplifier for a motor |
| CN2355485Y (en) * | 1998-10-09 | 1999-12-22 | 杨公俊 | Multifunctional three phase protection electronic switch |
| DE10222538A1 (en) * | 2002-05-17 | 2003-11-27 | Siemens Ag | Process for an actuator drive has electric motor in a square operating system having an H bridge circuit |
| CN101879942A (en) * | 2010-06-25 | 2010-11-10 | 北京航空航天大学 | Helicopter rotor wing automatic clutch control system with safety protection function |
| CN201918896U (en) * | 2010-11-03 | 2011-08-03 | 淄博安培电气有限公司 | Controlling circuit for improving working current of switched reluctance motor and direct-current motor |
| CN202076975U (en) * | 2011-06-03 | 2011-12-14 | 宁波杜亚机电技术有限公司 | Direct-current (DC) motor power interruption braking device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273877A (en) * | 2013-05-17 | 2013-09-04 | 柳州职业技术学院 | Controller of indicating board for school bus parking |
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Application publication date: 20120704 |